Valve for pumps, &amp;c.



No. 877,906. PATENTED FEB. 4, 1908.

E. E. CLARK.

VALVE FOR PUMPS, &o. APPLICATION FILED JUNE 11.1903.

QQ/@52516.51 @S/LMW@ j EZRA E. CLARK, OF SPRINGFIELD,

UNITED STATES PATENT OFFICE.

MASSCHIISETTS, ASSIGNOR TO GHARLES-H. PHINNEY,

TRUSTEE, OF CHESTNUT HILL, MASSACHUSETTS.

VALVE FOR PUMPS, &c.

Specification 'of Letters Patent.

Patented Feb. 4, 1908.

Application filed June 11. 1903. Serial No. 160.968. f

To GN vz/:zom it mug/ concern:

Be it known that I, EZRA E. CLARK, a citizen of the L'nited States, residing at Springfield, in the county of Hampden and State of Massachusetts, have invented an Improveupper side, as shown in Fig. 1, the guard has ment in Yalves for Pumps, &c., of which the following description, in connection with the i accompanying drawings, is a specification, like letters on the drawings representing like D to receive the lower end of the spring D2.

parts. This invention has for its object the production of an improved pump valve for use in underwriters and other pumps.

The valve disk of the valve to be herein described is guided by a valve stem having a projection and entera depression of the a- 'detachable guard that acts on the outer end of a cylindrically coiled valve spring, and said guard is prevented from sliding on the stem by means of a locking device that will be described.

Figure l shows in partial section a valve illustrating my invention in one of the best forms now known to me, the guard not being seated in operative position, the locking device or nut being represented as out of contact with the guard to better illustrate the projections and depressions; Fig. 2 is a section below the dotted line cr; Fig. 3 is an underside view of the nut removed from Fig. l; Fig. 4 is a sec-tion showing a modified construction of guard and nut; Fig. 5 is a plan view partially broken away; Fig. 6 is a plan view of another modified form of gu ard.

In the drawing, A represents part of the body or shell of a pump, and A the valve disk usually and preferably of india rubber. The valve seat B of non-corrodible metal is supposed to be forced into a bored hole of the shell until the bottom of the shoulder (L of the body of the valve seat substantially meets the shell, and thereafter prongs a at the inner end of the body of the seat are turned outwardly, as shown by full lines Fig.`

the upper end of the stern is slabbed off or In Fig. 1 i

made other than cylindrical in cross section to presentone or more flat faces that will revent rotation thereon of the guard C, the atter having a central hole of substantially one or more projections '2, or it might have depressions The outer side of the valve has applied to it a thrust plate D shaped to present a space The outer end of the valve stem, Fig. l, has applied to it a nut E represented as having at its underside a series of depressions e one for each projection 2 on the guard. It will be understood that the nut might have guard. Y

Vhen the guard is applied to the upper end of the spring, as represented, the guard is prevented from turning due to the irregular cross sectional form of the stem and the hole in the guard, and the depressions of the nut when screwed down upon the valve stem may be made to engage the projections of the guard, thereby locking the nut and guard together, and asvthe guard is prevented from turning by its irregular iiton the stem, the whole is secure from working off so long as the guard and nut are kept in contact by the force of the spring.

It will be understood that the underside of the guard, Fig. 1, will when the apparatus is in use contact nearly with lthe shoulder at the upper end of the enlarged central portion of the valve stem, and that in such condition the spring D2 will be somewhat compressed, and that the locking device or nut E will be turned down on the threaded stem and left in a position with a depression in the nut engaging a projection of the guard. The parts are represented in Fig. 2 in anv inoperative position merely to better illustrate the projections and depressions.

In the modifications Figs. 4 and 5, the guard therein marked F has a tapering recess in which fits the tapered sleeve-like portion g of the nut G.

The upper end of the stem B is slabbed off as provided for in Figs. 1 and 2, and the guard provided with a hole of corresponding shape, thus affording a positive means for preventing the guard from rotating on the stern. In this modification the action of the spring or of the valve at each movement of to the turning ofthe nut in the guard, and as the guard cannot turn, the two -parts are secure against working off.

v In the modication Fig. 6 the guard is provided with a series of faces 10 that co-act with the slab-faces of a nut like H3. The opening in the guard is in the shape of an inverted pyramid having, as shown, six sides.

Having described my invention, what I claim and desire to secure by Letters Patent 1s f 1. A ported valve seat, a central valve stem, a valve encircling and guided by said stem, a guard mounted on said stem, a spring interposed between said guard and said valve, said guard being formed With a polygonal hole and said stem throughout the parton which the guard slides being of corresponding polygonal form, a locking nut screwthreaded onto the end ofthe stem, means for preventing rotation of the nut and the guard when in engagement.

2. A ported valve seat, a central valve stem, a valve encircling and guided by said stem, a guard mounted on said stem, a spring interposed between said guard and said valve, said guard being formedl with a polygonal hole and said ,stem .throughout the part on which the guard slides belng of corresponding polygonal form, a locking. nut screwcated on said seat, a spring to holdthe valve to its seat, a valve stem, a collar on said stem, a nut threaded vto said stem, means on the stem to normally hold said collar fromturning on'the same, and means in said collar for engaging and holding said nut from turning. A

4. In a device of the character described, the'combination with a valve seat, of a valve located on said seat, a spring to hold the valve to its seat, a valve stem, a collar normally held from turning on said stem, and a nut threaded on said stem andy arranged to engage said collar to hold said nut fromturning, one of said engaging parts, namely the collar and nut, being provided with a recess and the other constructed to engage said recess. V

In testimony whereof, I have signed my name `to this specification, in the presence of two subscribing witnesses.

EZRA E. CLARK.

Witnesses:

GEO. W. GREGORY, MARGARET A. DUNN. 

